Title:
BLACK TEA MANUFACTURE
Document Type and Number:
WIPO Patent Application WO2002069727
Kind Code:
A3
Abstract:
A process for manufacturing a fast infusing black leaf tea. The process involves: (a) withering tea leaves to a moisture content between 64 and 70%; (b) macerating the withered leaves tea leaves by the controlled application of both shear and compression forces sufficient to disrupt the majority of cells within the tea leaf, to introduce morphological changes in the tissue and to redistribute the cell contents; (c) fermenting the resulting dhool; (d) firing the leaves to arrest the fermentation; and (e) drying and sorting the fired leaves to give black leaf tea. The black leaf tea shows a rate and degree of infusion typical of CTC teas, whilst maintaining the appearance of orthodox tea. The black leaf tea is preferably of Broken Orange Pekoe grade or larger if the black leaf tea is intended for direct infusion and of Broken Orange Pekoe and/or Broken Orange Pekoe Fannings if the black tea is intended for use in tea bags.
Inventors:
BLAIR LOUISA RUTH
COOPER MICHAEL ALAN
HARRIS CLIVE STANBRA
MUASYA STEPHEN MWANIKI
COOPER MICHAEL ALAN
HARRIS CLIVE STANBRA
MUASYA STEPHEN MWANIKI
Application Number:
PCT/EP2002/002308
Publication Date:
December 19, 2002
Filing Date:
February 26, 2002
Export Citation:
Assignee:
UNILEVER PLC (GB)
UNILEVER NV (NL)
LEVER HINDUSTAN LTD (IN)
UNILEVER NV (NL)
LEVER HINDUSTAN LTD (IN)
International Classes:
A23F3/08; A23F3/12; A23F3/14; (IPC1-7): A23F3/12; A23F3/06; A23F3/14
Domestic Patent References:
| WO2001082713A1 | 2001-11-08 | |||
| WO1999040799A1 | 1999-08-19 |
Foreign References:
| US6348224B1 | 2002-02-19 | |||
| GB2243675A | 1991-11-06 |
Other References:
DATABASE WPI Week 199233, 23 September 1991 Derwent World Patents Index; AN 1992-275021, XP002211591, DZNELADZE ZY, KHAREBAVA LM, REVISHVIU TO: "Processing of tea leaf - by drying, twisting, cutting, mincing, fermenting, drying and sepn. of fractions for prodn. of tea concentrates"
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